Carboxymethylcellulose Sodium (CMC-Na), identified by CAS 9004-32-4, is a prominent anionic cellulose ether derived from natural cellulose through a chemical modification process involving chloroacetic acid. This water-soluble polymer is characterized by its ability to form highly viscous solutions even at low concentrations, making it an essential rheology modifier in various industrial formulations. It typically presents as a white to off-white, odorless powder that exhibits excellent stability and compatibility with other surfactants and hydrocolloids.
Beyond its thickening capabilities, CMC-Na is recognized for its superior film-forming, water-retention, and emulsifying properties. In handling and research contexts, it is valued for its non-toxic nature and biodegradability, providing a sustainable alternative to synthetic polymers. Its performance is influenced by the degree of substitution and the degree of polymerization, which dictate its solubility and viscosity profile in aqueous systems. This versatility ensures its continued relevance as a foundational ingredient in both traditional manufacturing and advanced material science.